The one thing not addressed Izzy is that balance again should be done by nature and not man - perhaps we can learn o 'control' the environment, but we have been hacking the planet to pieces (deforestation), which can right it'self in 50 - 100 years at the moment. So apart from the human race raping the earth when it gets a chance to make money - at a cost to pay by the next generation eg ..affecting the water table by open mining for minerals. We are not decreasing we are increasing
The point is, volcanoes and termites combined, in one year, produce way more SO2 and CO2 than the human race has in its entire history. Volcanoes came before us, volcanoes will stay pretty much long after we're gone. The planet is going to be fine pretty much fine whatever we do, but we stand some chance of wiping out a fair amount of life. So to conclude, it's mostly a natural process (heh, actually it's kind of arrogant to actually think we have so much affect on our planet), but we are doing something to make it worse, and being natural doesn't mean it'll be good for us.
we are not doing enough to slow it down by recycling in this got to have it now disposable age... Must get the latest gadget/car/product...
I will have to look at your termite info, sounds interesting